A transmitter includes a power amplifier driver connected with a first transformer and a second transformer. The first transformer is configured for a first band mode and the second transformer is configured for a second band mode. The power amplifier driver drives both the first transformer and the second transformer.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A transmitter, comprising: a power amplifier driver; and a first transformer configured for a first band transmission rate; and a second transformer configured for a second band transmission rate, the first transformer and the second transformer connected with the power amplifier driver, where the power amplifier driver drives both the first transformer and the second transformer.
2. The transmitter of claim 1 , further comprising a mixer connected with the power amplifier driver, the mixer configured to provide both first band and second band mixed signals to the power amplifier driver.
3. The transmitter of claim 1 , where the power amplifier driver is configured to provide both gain control and first band and second band multiplexing.
4. The transmitter of claim 1 , where the power amplifier driver further comprises a steering circuit configured to select the first band transmission rate or the second band transmission rate.
5. The transmitter of claim 4 , where the steering circuit is configured to turn on at a first bias voltage and turn off at a second bias voltage.
6. The transmitter of claim 4 , where the steering circuit is configured to apply gain to a radio frequency signal.
7. The transmitter of claim 1 , wherein the first transformer and the second transformer are powered by about a 1.5 volts or less supply voltage.
8. The transmitter of claim 1 , further comprising a low pass filter connected with the power amplifier driver.
9. The transmitter of claim 8 , further comprising a digital-to-analog converter connected with the low pass filter, where a digital input of the digital-to-analog converter is configured to apply resistor/capacitor compensation information for the low pass filter.
10. A transmitter, comprising: a low pass filter configured to filter an analog communication signal; a mixer connected with the low pass filter, the mixer configured to mix the analog communication signal with a local oscillator signal to produce a mixed signal; and a power amplifier driver connected with the mixer, the power amplifier driver including a steering circuit, the power amplifier driver configured to steer the mixed signal to a first band transformer or a second band transformer.
11. The transmitter of claim 10 , where the steering circuit comprises a first band steering circuit and a second band steering circuit.
12. The transmitter of claim 10 , where the steering circuit is configured to provide gain to the mixed signal.
13. The transmitter of claim 10 , where the first transformer and the second transformer are powered by about 1.5 volts or less.
14. The transmitter of claim 10 , where the low pass filter comprises a second order passive low pass filter.
15. The transmitter of claim 14 , further comprising a buffer connected with the second order passive low pass filter where the buffer provides about 5 ohms or less output impedance to the analog communication signal.
16. The transmitter of claim 14 , further comprising a digital-to-analog converter connected with the second order passive low pass filter where resistor/capacitor compensation information is applied to a digital input of the digital-to-analog converter.
17. A local oscillator generator for a transmitter, comprising: a first buffer to supply a first transmission rate for a first band mode transformer; a second buffer to supply a second transmission rate for a second band mode transformer; and an output of the first buffer directly connected to an output of the second buffer, wherein the first buffer and the second buffer operate as an open circuit when off.
18. The local oscillator generator of claim 17 , further comprising a gate connected with the first buffer and the second buffer to provide a twenty-five percent clock signal.
19. The local oscillator generator of claim 17 , where the second buffer include a circuit for the I+, I−, Q+ and Q− channels.
20. The local oscillator generator of claim 17 , where the circuit comprises a transmission switch to isolate an input to the second buffer from an output of the second buffer.
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August 9, 2013
April 14, 2015
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